Inclined grate for furnaces.



G H THACHER, JR.

INCLINED GRATE FOR FURNACES.

APPLICATION FILED 001222. 1912.

Patented Sept. 1, 1914.

UNITED sTATEs PATENT oEEicE.

GEQRGE n. TEACHER, Jn., or ALBANY, NEW YORK, Assronon To .GEORGE n.

' TEACHER., sn., -or NEW Yonx l Y l immuni @LATE ron FtmNAoEsepeeiacamofwesmm. A`reliant-aisept.i,1914.

applicati@ siedo-mener 22,1912. seriainamniis.

others skilled in the .artto which it apper- .i

v .tains to make and use the same.

- i My invention relates. to that class of fur-,i

)nace grates, 'wherein inclined grate surfaces.

receive their fuel from a ycentral magazinel or similar source =ofsupply, and discharge their ashes Aand slanker into the ash-pit,preferahly .through .the intermediacy ofadumping grate located yat ,thebase-of the incline..

Particularly, my invention .relates to lthe Vinclined grate itself andto the :manner in. whichit is connected-at its upper pant t0? -In theaccompanying drawing, Figure il represents, a top plan view, partlybroken away, of my invention, illustrating its application to a suitableform of steam boiler fur nace;v Fig. 2 represents, partly broken awayand partly in section, one 'of the individual. bars of the inclinedgrate and shows the manner in which the inclined grate bars aresupported from the .magazine .wall at their upper portions and from asupporting bar at their lower portions; Fig. 3 represents a.crosesectional view, 'partly vin elevation, of

one of -the inclined grate bars; and 4 represents a top plan view of theupper part of one of the inclined grate bars and Fig. 5 is a perspectiveview thereof.

Similar letters of reference indicate simi, lar parts throughout theseveral views.

Referring to the drawing, D indicates-the magazine, from which the finefuel is fed to the upper part of the inclined grate surfaces, whichinclined grate surfaces are made up of the individual grate bars I. Thefuel is fed from the hopper C and is raised by theconveyer blades 0 soas to be discharged over the edge of the magazine, as will be understoodby those skilled in the art. The inclined grate surfaces preferably7discharge upon the dumping grates 7c n d1agrainmat-v ically illustratedin Fig. 1. The individual grate bars are provided at their upper endswith a tongue-or extension 11 which enters a corresponding .recess j atthe upper part of the corresponding wall of the' :maga-zine D,

as shown more fully ,in Fig. b2 suiicient vclearance being left forexpansion.

,As .indicated -i-n il'iigs. 1 vand 5., the lower ends of :the inclined.grate bars. rest upon a supporting bar J constituting a part of the'frame of the dumping grate. 'zllhe .inclined grate bar I is made .up of:two side webs with which the tongue or projection a' iscast integrallyand is :likewise joined by crossvcormections :likewise cast integrally-there- 'wit-ln The connections a: serve not .only to join rthe ,twoside webs of :the inclined grate bar but also s erve as anchors, for:holding in place .the .individual :sections .y of :the grate surface.These individual sections are ,preferably Aprovided with a bottom lug z,as shown, which lug -has cast .within :it a wrought iron tongue e, sothat, by .bending the @tongue e beneath the corresponding crossAconnection m, it can be held in place,

f but may vbe removed by bending'the wrought iron :tongue lin theopposite direction so asA to release it 'from 4the cross-connection.

1t Wlll be particularly noted that the individual sections 3'/ 4arearranged in step or der, so as ,to leave between them spaces inldicatedat w -in Fig. 5, through which :the air issuing' from the `ash pitenters the fuel. This arrangement is for the purpose of directing themain-body ofthe air thus admitted', into :the `fuel laterally instead ofvertically therein. It will be further noted that the air .thus admittedthrough .the open- -ings a." (which extend from sidev wall to side wallof the inclined grate bar). enters what is substantially a triangularspace beneath lthe descending body of fuel. As a consequence, thepressure'of the air is equalized in this space, and the tendency tochannel the fuel is correspondingly diminished. So also, the air assistsin the down feed of the fuel from one step to the other of the inclinedgrate-bar, as the fuel isconsumed. If desired, the section y maylikewise be provided with air openings lw', as shown, but these openingsare supplemental in their character and can be omitted or may be of anyother configuration than -th'e slots'indicated.

The principal advantage of supporting the upper end of the inclinedgrate bars by means ofthe tongue and slot connection shown is that thedistribution of the fuel from the magazine is facilitated for the reasonthat the airis thus cut off from the fuel at this point so that thegreen uel is lpartly coked upon contact with the over?l hanging surf-aceof the magazine and upper surface of tongue z2 So also, the air being inthe main diverted laterally through the slots` the danger 'of channelings practically avoided, to the great advantage of the operation.

Having thus described my invention what I claim is:

. l. The combination with a stationary inclined grate, of a magazine fordistributing fuel thereto, said magazine having a slot or groovearranged longitudinally in its outer Wall, and the inclined grate havingtongues received Within and covered by said slot; said tongues beingfree to move therein 'when the grate expandswith vheat substantiallyasdescribed.

2. The combination with a magazine provided With a slot or'groove, of astationary inclined grate bar provided at its extreme ripperv end- Withaflat, inclined tongue adapted vto seat Within said slot or groove tosup- .port the gratebarlzat its upper end, .said

tongue beingfree to move -intoandout of said slot or groove vvith theexpansion and contraction of said grate bar; substantially as described.

3. A grate bar for inclined grate's, having notched and chamfered upperedges and provided with aseries of flat, perforate inclined platesseatedjon said chamfered edges and forming steps, said stepsbeingseparate and` each removable fromits normal position in the grateindependently and Without movement of any other step, or series of'stepseach step being provided With a' b'endable. tongue for removablysecuring it in place; substantially as described. n

4. A grate bar for inclined grates, pro-' vided with side Webs,4 havingnotched and chamfered upper edges cross-connections for 4said websformed integral therewith, and

inclined individual steps one for each cross-' connection' and'anchoredthereto, said steps being independently removable therefrom Withoutdisturbing any other step or series of steps, said lsteps beingsupported at their edges on said side Webs and being spaced apart toform intervening gas openings` through said bar of a uniform Width fromweb to Web; substantial-ly as described.

6. A grate bar 'for inclined grates, coinl prising side Webs,cross-c0nnections for)` said Webs, and an inclined tongue integral withsaid Webs and adapted to support the grate bar at its upper end, and4inclined steps each anchored to a cross-connection and seated- Whollybetvveen the top portions oi" the webs, said steps beingindependentlyremovable, and the straight front edge of onev forming with the straightrear edge of the next an `air passage of uniform Width, extending

